| 2004-06 |
Founded as a company focused on IT knowledge, offering web advertising media, IT schools, personnel consulting, software development, and system integration, SII LLC was established in Nihonbashi Bakaimachi. |
| 2004-06 |
Opening of System Architecture Knowledge at Nihonbashi Bakaimachi. |
| 2004-06 |
Launch of IT portal site "Career License". |
| 2004-06 |
Launch of IT school 'Secure Network Academy' |
| 2004-06 |
Launch of IT job site 'Job Match' |
| 2004-08 |
Graduation of the first cohort |
| 2004-09 |
Launched LPIC Level 1 course to expand learning programs |
| 2005-04 |
Launched ITIL Foundation course to expand learning programs |
| 2005-06 |
Initiated OJT scholarship program in partnership with multiple companies |
| 2005-11 |
Launched CCNP and Java-related courses to expand learning programs |
| 2005-11 |
To expand learning courses, launched CCNA course and Java-related courses |
| 2006-06 |
Relocated from Nihonbashi Bakaimachi to Akihabara and Kanda Sakumamachi due to increased student numbers |
| 2006-06 |
Launched the IT technology portal site 'Linux Information Exchange' |
| 2006-09 |
Changed company name from SII LLC to SII Co., Ltd. |
| 2007-01 |
Launched LAMP web application course to expand learning programs |
| 2007-07 |
Released 'Mobiledav' application developed by instructors |
| 2008-06 |
Renovated IT job site 'Job Match' as 'Job Career' |
| 2008-06 |
Renovated IT school 'Secure Network Academy' as 'System Architecture Knowledge (SAK)' |
| 2008-07 |
Increased capital to 10 million yen to expand school business |
| 2008-08 |
Renamed IT job site 'Job Match' to 'Job Career' |
| 2008-08 |
The IT school Secure Network Academy was renewed as 'System Architecture Knowledge' (SAK). |
| 2009-04 |
The full-time instructor team at IT school SAK expanded to 10 members. |
| 2009-04 |
IT school SAK's full-time instructor team expanded to 10 members |
| 2009-05 |
The cumulative number of graduates from IT school SAK surpassed 1,000. |
| 2009-05 |
Cumulative graduates of IT school SAK exceeded 1,000 |
| 2010-06 |
To increase student numbers at IT school SAK, it relocated from Kanda Sakuma-cho to Kanda Matsunaga-cho. |
| 2010-06 |
To increase student numbers, IT school SAK relocated from Kanda Sakuma-cho to Kanda Matsunaga-cho |
| 2011-03 |
An agent team was formed to support job placement for students of IT school SAK. |
| 2011-03 |
Established an agent team to support students' employment and career transition at IT school SAK |
| 2011-08 |
Capital was increased to 30 million yen to expand the school business. |
| 2012-08 |
The blog 'SAK Blog' of IT school SAK was opened. |
| 2012-08 |
Distributing engineer job placement, recruitment, and technical information. |
| 2012-08 |
Opened IT school SAK's blog 'SAK Blog', delivering engineer career change, recruitment, and technical information |
| 2013-04 |
The IT job site 'Job Career' was renewed. |
| 2013-05 |
The cumulative number of graduates from IT school SAK surpassed 3,000. |
| 2013-05 |
Cumulative graduates of IT school SAK exceeded 3,000 |
| 2013-06 |
The IT technical specialist job placement support site 'IT転職AGENT@PRO人' was launched. |
| 2013-06 |
Launched IT technical specialist career transition support site 'IT Career Agent @ PRO Hito' |
| 2014-05 |
The 10th anniversary of the opening of IT school SAK. |
| 2014-05 |
A new Shinjuku campus was opened. |
| 2014-05 |
Celebrated 10th anniversary of IT school SAK and opened a new Shinjuku campus |
| 2014-06 |
A CCNA certification preparation book written by instructors of IT school SAK was published by Sho-ehyōsha. |
| 2014-06 |
CCNA certification guidebook written by IT school SAK instructors published by Shogakukan |
| 2015-05 |
Established a security solutions division due to business expansion |
| 2015-07 |
A security solutions division was established due to business expansion. |
| 2015-09 |
The website of IT school SAK was renewed. |
| 2015-09 |
Renovated IT school SAK's website |
| 2015-11 |
The tech blog 'TECH PROJIN' (Tech Projin) for IT engineers started. |
| 2015-11 |
Started IT engineer's TECH blog 'TECH PROJIN' |
| 2016-04 |
A Unity game development course was launched to expand learning courses at IT school SAK. |
| 2016-05 |
The cumulative number of graduates from IT school SAK surpassed 5,000. |
| 2016-05 |
Cumulative graduates of IT school SAK exceeded 5,000 |
| 2016-06 |
Launched Unity game development course to expand learning offerings at IT school SAK |
| 2020-01 |
A game integration division was established due to business expansion. |
| 2020-03 |
Complete renewal of the Akihabara campus building of IT School SAK. |
| 2020-03 |
Completely renovated IT school SAK's Akihabara campus |
| 2020-06 |
Relocation of office functions from the 3rd floor to the 7th floor of the Biore Akihabara Building. |
| 2020-06 |
To expand the business, the office functions were moved from the 3rd floor of the Biore Akihabara Building to the 7th floor of the Biore Akihabara Building. |
| 2021-05 |
Cumulative number of graduates surpassed 10,000. |
| 2021-10 |
Release of the reference book and learning smartphone app "BOOKNS" (Booknes). |
| 2021-10 |
Released the reference book and learning smartphone app 'BOOKNS' (Booknes). |
| 2022-05 |
Cumulative number of graduates of IT School SAK surpassed 13,500. |
| 2022-05 |
The cumulative number of graduates from IT School SAK surpassed 13,500. |
| 2022-09 |
The cumulative number of graduates from IT School SAK surpassed 15,000. |
| 2022-10 |
Renewal of the IT School SAK website. |
| 2022-10 |
Renovation of the IT School SAK website. |
| 2022-11 |
Cumulative number of graduates of IT School SAK surpassed 15,000. |
| 2023-01 |
BOOKNS FRAME appeared on TOKYO MX's "Eejanai Kaku Biz". |
| 2023-01 |
BOOKNS FRAME appeared on TOKYO MX's 'Eejanai Kaku Biz'. |
| 2023-12 |
The most popular CCNA course in the corporate learning service BOOKNS offers instructor-led learning content with AI coaching. |
| 2023-12 |
The most popular CCNA course in the corporate learning service 'BOOKNS' offers instructor-led learning content with AI coaching. |
| 2024-09 |
Agreement reached in cooperation with the Saga Prefecture Industrial Smartization Center. |
| 2024-12 |
Shares listed on the Tokyo Stock Exchange TOKYO PRO Market. |
| 2025-05 |
Signed an international education partnership with Essex University. |
| 2025-09 |
Opening of SAK University Tokyo Innovation Campus. |
| 2025-09 |
Completion of Shinagawa Tennōzu Campus. |
| 2025-09 |
First-year commencement ceremony (night division). |
| 2025-09 |
Opening of SAK University Tokyo Innovation Campus, completion of Shinagawa Tennozu Campus, and first-year commencement ceremony (night division). |
| 2025-10 |
Opening ceremony of SAK University Tokyo Innovation Campus. |
| 2025-10 |
Cumulative number of graduates of IT School SAK surpassed 16,000. |
| 2025-10 |
Opening ceremony of SAK University Tokyo Innovation Campus and the cumulative number of graduates from IT School SAK surpassed 16,000. |
| 2026-01 |
SII Co., Ltd. joined the British Chamber of Commerce in Japan (BCCJ). |
| 2026-04 |
As the first cohort of SAK University Tokyo Innovation Campus, more than 100 new students began their school life. |
